Some of the most powerful earthquakes in decades hit the Middle East on Monday, killing more than 1,000 people in Turkey and Syria.

The disaster management authority said 1,014 people were killed in the two quakes that struck the cities of Gaziantep and Kahramanmaras.

A first 7.7 magnitude earthquake struck before dawn with an epicenter near the city of Gaziantep, also killing almost 250 in Syria. A second earthquake registering 7.5 hit Turkey’s southeast later Monday.